GE Industrial Solutions Entellisys 5.0 Integrator's Guide - Manual (Page 7)

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1 Control Features
Entellisys CPUs provide Voltage, Current, Power, breaker, discrete I/O status and control for 3rd
party integrators. Allowing integrators to utilize the power of Entellisys for paralleling, load
shedding or other power monitoring/control applications. The five main features are:
• IEC61850 (GOOSE I/O): A subset of the IEC 61850 standard and is used to transmit and
receive discrete and analog information between devices. In Entellisys, GOOSE is
implemented to communicate discrete bits of information only – status or commands –
to other IEC 61850 GOOSE compliant devices. (See Section 10.2 in DEH-501)
• PLC Inputs: Provides external control inputs into FlexLogic.
• Restricted Breaker Control: Limits the ability for Entellisys HMIs or other Modbus devices
to issue Open, Close or Trip commands to breakers
• External Control Transfer: Provides the ability for an external supervisory controller to
dictate which CPU will run as the master.
• System Status: Provides status of all breakers and protective relays.
Both CPUA and CPUB are configured to operate as Modbus TCP servers and can service up to 4
devices on port 502 including any Remote HMI workstations. Remote HMI workstations are
customer owned computers running the Entellisys Remote HMI Interactive or Viewer software.
(Note: All panel mounted HMI touchscreens are designed to operate on a different port and are
not included as one of the port 502 devices.)
The Entellisys CPU recognizes one of the three available Modbus tables - the input register table.
The Entellisys CPU also recognizes 3 Modbus function codes: 04, 06 and 16. (See
section 3.5
on page 48 )
Table 1-1 Modbus Function Codes
CAUTION: Although the CPU protects critical areas, erroneous write commands may affect the
performance of the gear.
Function Code Action Supported Table
01 Read Multiple No Discrete Coils (read-write)
02 Read Multiple No Discrete Inputs (read-only)
03 Read Multiple No Output Holding Registers
04 Read Multiple Yes Input Registers
05 Write Single No Discrete Coils
06 Write Single Yes Input Registers
15 (0F) Write Multiple No Discrete Coils
16(10) Write Multiple Yes Input Registers